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Track bike on smart trainer?

Old 03-17-18, 05:22 PM
  #51  
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All this talk about Lemond trainers has me curious. I've never used one.

How would you describe the feel? Can you load initial resistance on it for standing starts? Or is it simply best used for rolling stuff at speed?
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Old 03-19-18, 10:40 AM
  #52  
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Looks like TrackHackSolutions on facebook is selling these for $250 each. That seems a little steep.

I'm going to modify the bearing pressfit dimensions and send the drawing back to my machinist, then I'll see how much he'll charge for 5 or 10 of these.

The typical road skewer works fine, all it needed was two spacers from a leftover fixed gear hub, and I cut down the sleeve from the original shimano freewheel setup (seen in black on the spindle).

https://photos.app.goo.gl/FoxdaLWSLG7OYVLD2

https://photos.app.goo.gl/x2jErEB3q7NtNMik2

chainline looks perfect:
https://photos.app.goo.gl/quD6ssJacoKbbyoq1

As far as standing starts, I'd say it'll work fine. It has a lot of intertia, but not as much as a 220lb guy on the track, so to mimic that I would run a larger gear than on the track for standing starts. I'll try some starts on it tonight and see how it goes.
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Old 03-19-18, 11:04 AM
  #53  
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That looks really good. If a Lemond comes by on the cheap I might give it a closer look now.
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Old 03-19-18, 12:24 PM
  #54  
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Originally Posted by alfa111 View Post
Looks like TrackHackSolutions on facebook is selling these for $250 each. That seems a little steep.

I'm going to modify the bearing pressfit dimensions and send the drawing back to my machinist, then I'll see how much he'll charge for 5 or 10 of these.

The typical road skewer works fine, all it needed was two spacers from a leftover fixed gear hub, and I cut down the sleeve from the original shimano freewheel setup (seen in black on the spindle).

https://photos.app.goo.gl/FoxdaLWSLG7OYVLD2

https://photos.app.goo.gl/x2jErEB3q7NtNMik2

chainline looks perfect:
https://photos.app.goo.gl/quD6ssJacoKbbyoq1

As far as standing starts, I'd say it'll work fine. It has a lot of intertia, but not as much as a 220lb guy on the track, so to mimic that I would run a larger gear than on the track for standing starts. I'll try some starts on it tonight and see how it goes.
Looks awesome!

One good thing is that since you are using a proper track cog on the rear, you could rig up a way to put the speed sensor next to the flywheel that would have a magnet doube-sided taped to it. And that would get you speed that might be close to real world simulations. It would a nice bonus to find that it's calibrated to provide exponential resistance based on the speed of the flywheel and having it match the real world for a given generic CdA.

Also, maybe engage a chain tensioner on the drive side before doing starts. The skewers may allow for slipping.

One more question: Does the fan have some sort of gate on it to allow you to fine-tune resistance like the Wattbike does? Are you doomed to have to switch chainrings/cogs to get different resistance levels?
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Old 03-19-18, 01:15 PM
  #55  
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Thanks guys! Yeah, I'm sure that would work, however I have the wattbox power meter for mine which uses a magnet placed on the non-drive side of the 'wheel'. It uses the known mass of the flywheel and takes into account pressure and temperature to estimate force to spin the fan. Not as exact as a strain-gauge power meter but it'll work for me.

https://www.bikerumor.com/2014/01/27...-now-shipping/

If the skewer slips during starts, I'll just throw a track nut on the drive side since the spindle threads are the same as rear hub axle threads.

You're stuck switching gears if you want to change resistance which is unfortunate for warmup to workout-effort transitions. The fan isn't adjustable and if it were, the power meter would be really inaccurate.
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Old 03-19-18, 01:18 PM
  #56  
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I have my Fuji track on a Kurt Kinetic smart trainer.
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Old 03-20-18, 08:17 AM
  #57  
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Originally Posted by REDMASTA View Post
I have my Fuji track on a Kurt Kinetic smart trainer.
@REDMASTA
Have you used track cone cups or did you have success with original cons cups?
kurtkinetic.com/cone-cup-adapters-products/track-cone-cups
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Old 03-20-18, 09:24 AM
  #58  
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Originally Posted by pi03k View Post
@REDMASTA
Have you used track cone cups or did you have success with original cons cups?
kurtkinetic.com/cone-cup-adapters-products/track-cone-cups
I use the standard cone cups, work fine with the track nuts on my fuji. It comes with one slotted and one non-slotted cup, but I ordered an extra non-slotted so that they match. Haven't tried the "Track Cone Cups" so can't comment if they are any better.
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Old 03-20-18, 10:46 AM
  #59  
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How are these Track Cone Cups to be used? I've never seen them before.



EDIT: Answered my own question:

https://support.kurtkinetic.com/hc/e...with-axle-nuts


Single speed or track bikes will need either two of the Standard Cone Cups (shown above) or two of the Track Cone Cups which are slightly larger than the Standard Cone Cup. Current model Kinetic trainers come with one Standard cup and one Slotted Cup. Bikes with standard 15mm axle nuts will work with the Standard Cone Cup on both sides. (image above)

Check to see if the axle nuts fit securely inside the Standard Cone Cup (image below). Some track bikes have axle nuts that are larger or do not fit well in the Standard Cone Cup that comes on the trainer. Those bikes will require our Track Cone Cups on both sides.
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Old 03-20-18, 12:58 PM
  #60  
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Like @carleton posted the standard cone cups fit over the track nuts. I specifically bought the Kurt Kinetic trainer because you can use them with 120mm spaced hubs. The Wahoo trainers for example won't work, so keep that in mind when shopping around. Calibrating a fixed gear is a little funny since you have to take your feet off the pedals to "coast" but otherwise sets up fine. The smart trainers also have ERG mode which is really useful.

I got the rock n' roll version since i wanted to be able to stand up and sprint more naturally, it's a neat feature but the unit itself is a BEAST. it's definitely something you need to leave set up, unlike some smaller lightweight trainers you could move out of the way. Doing some rearranging as I just got a new monitor and Apple TV 4k to run Zwift on instead of the laptop I was using. I'll post some pictures up if you're interested.
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Old 03-23-18, 10:00 AM
  #61  
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Originally Posted by carleton View Post
Looks awesome!



Also, maybe engage a chain tensioner on the drive side before doing starts. The skewers may allow for slipping.
https://photos.app.goo.gl/9JTdVfrPH07lAArC3

Did quite a few standing starts and hard efforts on it and the skewer wasn't slipping at all.

Finally having a power meter -- even if it is on a trainer -- is a game changer for me.
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Old 03-23-18, 10:35 AM
  #62  
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Originally Posted by alfa111 View Post
https://photos.app.goo.gl/9JTdVfrPH07lAArC3

Did quite a few standing starts and hard efforts on it and the skewer wasn't slipping at all.

Finally having a power meter -- even if it is on a trainer -- is a game changer for me.
Nice!
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Old 05-12-18, 11:20 PM
  #63  
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Finally got 10 parts back from the machine shop! I'll press in bearing and put together kits with fasteners and spacers then put these up for sale.

https://photos.app.goo.gl/whPtADWFhyvKgQrMA
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Old 05-15-18, 10:07 AM
  #64  
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I just started using a CycleOps Magna with my track bike. I do a lot of interval training on it when I can't get to VSC and it works well. The only problem I have had is that when you rest in between sets, the trainer goes to sleep and it takes a couple of minutes for it to wake up and settle down to the selected resistance. It seems to default to huge resistance, which is a little bit tough when you are doing rev-ups. Works for practicing standing starts though! I like the basic structural configuration because it has a notched selector on the frame that adjusts for three different drop out distances. I guess I am just lazy, and really like being able to easily change the configuration between road and track bike sizes.
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Old 05-22-18, 12:23 AM
  #65  
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Do you have any of these kits left for sale?
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Old 05-27-18, 11:07 PM
  #66  
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Originally Posted by hotwheels1 View Post
Do you have any of these kits left for sale?
Yes sir, I just finished putting the kits together but still working on writing installation instructions. I have 10 for sale that are all ready to ship, I just put them up on my otherwise blank website. Let me know if you have any questions

https://sasquatchlegs.com/shop?olsPage=products
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Old 10-22-18, 10:12 PM
  #67  
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Not sure where to put this, but I have since given up on figuring out a way to put my track bike on a smart trainer with its own drive train/cassette. I found a solution that works better for me. I connect my power meter my training app (Rouvy), and use Kreitler rollers with the killer headwind fan. I find that with some trial and error and using the various settings on the fan, I can match the resistance of the sprint lane on a velodrome. This allows me to do these new Rouvy virtual workouts I just uploaded with synced video, taken last weekend.

Hopefully this attracts a few others who are stuck indoors most of the winter and looking for some velodrome virtual rides with synced video. Beats doing Z2-3 on rollers and staring at a mote of dust in the air. ;-) I recorded some GoPro footage last weekend at the Alpenrose Velodrome in Portland, OR, and created 4 routes:

500m TT https://my.rouvy.com/virtual-routes/...7468?useHost=1

18K (11mi) https://my.rouvy.com/virtual-routes/...7448?useHost=1

26K (16mi) https://my.rouvy.com/virtual-routes/...7455?useHost=1

40K (24.7mi) - https://my.rouvy.com/virtual-routes/...7458?useHost=1
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Old 10-24-18, 03:15 PM
  #68  
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Originally Posted by alfa111 View Post
Yes sir, I just finished putting the kits together but still working on writing installation instructions. I have 10 for sale that are all ready to ship, I just put them up on my otherwise blank website. Let me know if you have any questions

https://sasquatchlegs.com/shop?olsPage=products
I just sent you a private message...I am thinking of pulling the trigger on this.
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